Fix conversion error to actually be 500MB

Author: Nick Litwin

app/directives/tc-file-input/tc-file-input.directive.js

@@ -49,7 +49,7 @@ import _ from 'lodash'
           }
 
           var fileSize = file.size
-          var isAllowedFileSize = fileSize < '500000000'
+          var isAllowedFileSize = fileSize < '524288000'
 
           var selectedFileType = file.type.slice(file.type.lastIndexOf('/') + 1)
           var isAllowedFileFormat = _.some(fileTypes, _.matches(selectedFileType))

app/directives/tc-file-input/tc-file-input.spec.js

@@ -163,7 +163,7 @@ describe('Topcoder File Input Directive', function() {
 
     describe('with a file that\'s greater than 500MB', function() {
       beforeEach(function() {
-        fileList[0].size = 500000001
+        fileList[0].size = 524288001
 
         $(fileInput).triggerHandler({
           type: 'change',